<?php
// This file is part of The gdxw 3 Moodle theme
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

defined('MOODLE_INTERNAL') || die();

/**
 * Renderers to align Moodle's HTML with that expected by gdxw
 *
 * @package    theme_gdxw
 * @copyright  2012
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

class theme_gdxw_core_renderer extends core_renderer {

    public function notification($message, $classes = 'notifyproblem') {
        $message = clean_text($message);

        if ($classes == 'notifyproblem') {
            return html_writer::div($message, 'alert alert-danger');
        }
        if ($classes == 'notifywarning') {
            return html_writer::div($message, 'alert alert-warning');
        }
        if ($classes == 'notifysuccess') {
            return html_writer::div($message, 'alert alert-success');
        }
        if ($classes == 'notifymessage') {
            return html_writer::div($message, 'alert alert-info');
        }
        if ($classes == 'redirectmessage') {
            return html_writer::div($message, 'alert alert-block alert-info');
        }
        if ($classes == 'notifytiny') {
            // Not an appropriate semantic alert class!
            return $this->debug_listing($message);
        }
        return html_writer::div($message, $classes);
    }

    private function debug_listing($message) {
        $message = str_replace('<ul style', '<ul class="list-unstyled" style', $message);
        return html_writer::tag('pre', $message, array('class' => 'alert alert-info'));
    }

    public function navbar() {
        $items = $this->page->navbar->get_items();
        if (empty($items)) { // MDL-46107
            return '';
        }
        $breadcrumbs = '';
        foreach ($items as $item) {
            $item->hideicon = true;
            $breadcrumbs .= '<li>'.$this->render($item).'</li>';
        }
        return "<ol class=breadcrumb>$breadcrumbs</ol>";
    }

    public function custom_menu($custommenuitems = '') {
        // The custom menu is always shown, even if no menu items
        // are configured in the global theme settings page.
        global $CFG;

        if (empty($custommenuitems) && !empty($CFG->custommenuitems)) { // MDL-45507
            $custommenuitems = $CFG->custommenuitems;
        }
        $custommenu = new custom_menu($custommenuitems, current_language());
        return $this->render_custom_menu($custommenu);
    }

    protected function render_custom_menu(custom_menu $menu) {
        global $CFG, $USER;

        // TODO: eliminate this duplicated logic, it belongs in core, not
        // here. See MDL-39565.

        $content = '<ul class="nav navbar-nav">';
        foreach ($menu->get_children() as $item) {
            $content .= $this->render_custom_menu_item($item, 1);
        }

        return $content.'</ul>';
    }

    public function user_menu($user = NULL, $withlinks = NULL) {
        global $CFG;
        $usermenu = new custom_menu('', current_language());
        return $this->render_user_menu($usermenu);
    }

    protected function render_user_menu(custom_menu $menu) {
        global $CFG, $USER, $DB;

        $addusermenu = true;
        $addlangmenu = true;

        $langs = get_string_manager()->get_list_of_translations();
        if (count($langs) < 2
        or empty($CFG->langmenu)
        or ($this->page->course != SITEID and !empty($this->page->course->lang))) {
            $addlangmenu = false;
        }

        if ($addlangmenu) {
            $language = $menu->add(get_string('language'), new moodle_url('#'), get_string('language'), 10000);
            foreach ($langs as $langtype => $langname) {
                $language->add($langname, new moodle_url($this->page->url, array('lang' => $langtype)), $langname);
            }
        }

        if ($addusermenu) {
            if (isloggedin()) {
                $usermenu = $menu->add(fullname($USER), new moodle_url('#'), fullname($USER), 10001);
                $usermenu->add(
                    '<span class="glyphicon glyphicon-off"></span>' . get_string('logout'),
                    new moodle_url('/login/logout.php', array('sesskey' => sesskey(), 'alt' => 'logout')),
                    get_string('logout')
                );

                $usermenu->add(
                    '<span class="glyphicon glyphicon-user"></span>' . get_string('viewprofile'),
                    new moodle_url('/user/profile.php', array('id' => $USER->id)),
                    get_string('viewprofile')
                );

                $usermenu->add(
                    '<span class="glyphicon glyphicon-cog"></span>' . get_string('editmyprofile'),
                    new moodle_url('/user/edit.php', array('id' => $USER->id)),
                    get_string('editmyprofile')
                );
            } else {
                $usermenu = $menu->add(get_string('login'), new moodle_url('/login/index.php'), get_string('login'), 10001);
            }
        }

        $content = '<ul class="nav navbar-nav navbar-right">';
        foreach ($menu->get_children() as $item) {
            $content .= $this->render_custom_menu_item($item, 1);
        }

        return $content.'</ul>';
    }

    protected function render_custom_menu_item(custom_menu_item $menunode, $level = 0 ) {
        static $submenucount = 0;

        if ($menunode->has_children()) {

            if ($level == 1) {
                $dropdowntype = 'dropdown';
            } else {
                $dropdowntype = 'dropdown-submenu';
            }

            $content = html_writer::start_tag('li', array('class' => $dropdowntype));
            // If the child has menus render it as a sub menu.
            $submenucount++;
            if ($menunode->get_url() !== null) {
                $url = $menunode->get_url();
            } else {
                $url = '#cm_submenu_'.$submenucount;
            }
            $linkattributes = array(
                'href' => $url,
                'class' => 'dropdown-toggle',
                'data-toggle' => 'dropdown',
                'title' => $menunode->get_title(),
            );
            $content .= html_writer::start_tag('a', $linkattributes);
            $content .= $menunode->get_text();
            if ($level == 1) {
                $content .= '<b class="caret"></b>';
            }
            $content .= '</a>';
            $content .= '<ul class="dropdown-menu">';
            foreach ($menunode->get_children() as $menunode) {
                $content .= $this->render_custom_menu_item($menunode, 0);
            }
            $content .= '</ul>';
        } else {
            $content = '<li>';
            // The node doesn't have children so produce a final menuitem.
            if ($menunode->get_url() !== null) {
                $url = $menunode->get_url();
            } else {
                $url = '#';
            }
            $content .= html_writer::link($url, $menunode->get_text(), array('title' => $menunode->get_title()));
        }
        return $content;
    }

    protected function render_tabtree(tabtree $tabtree) {
        if (empty($tabtree->subtree)) {
            return '';
        }
        $firstrow = $secondrow = '';
        foreach ($tabtree->subtree as $tab) {
            $firstrow .= $this->render($tab);
            if (($tab->selected || $tab->activated) && !empty($tab->subtree) && $tab->subtree !== array()) {
                $secondrow = $this->tabtree($tab->subtree);
            }
        }
        return html_writer::tag('ul', $firstrow, array('class' => 'nav nav-tabs nav-justified')) . $secondrow;
    }

    protected function render_tabobject(tabobject $tab) {
        if ($tab->selected or $tab->activated) {
            return html_writer::tag('li', html_writer::tag('a', $tab->text), array('class' => 'active'));
        } else if ($tab->inactive) {
            return html_writer::tag('li', html_writer::tag('a', $tab->text), array('class' => 'disabled'));
        } else {
            if (!($tab->link instanceof moodle_url)) {
                // Backward compatibility when link was passed as quoted string.
                $link = "<a href=\"$tab->link\" title=\"$tab->title\">$tab->text</a>";
            } else {
                $link = html_writer::link($tab->link, $tab->text, array('title' => $tab->title));
            }
            return html_writer::tag('li', $link);
        }
    }

    public function box($contents, $classes = 'generalbox', $id = null, $attributes = array()) {
        if (isset($attributes['data-rel']) && $attributes['data-rel'] === 'fatalerror') {
            return html_writer::div($contents, 'alert alert-danger', $attributes);
        }
        return parent::box($contents, $classes, $id, $attributes);
    }

    public function content_zoom() {
        $zoomin = html_writer::span(get_string('fullscreen', 'theme_gdxw'), 'zoomin');
        $zoomout = html_writer::span(get_string('closefullscreen', 'theme_gdxw'), 'zoomout');
        $content = html_writer::link('#',  $zoomin . $zoomout,
            array('class' => 'btn btn-default pull-right moodlezoom'));
        return $content;
    }
}
